Department of Oral Maxillofacial and Plastic Facial Surgery, University Medical Centre Frankfurt/Main, Theodor-Stern-Kai 7, 60596 Frankfurt/Main, Germany.
J Craniomaxillofac Surg. 2012 Dec;40(8):e408-14. doi: 10.1016/j.jcms.2012.02.014. Epub 2012 Apr 13.
After two decades of the use of resorbable miniplates, new polymer compositions for resorbable osteosynthesis are still being developed to make the handling and outcome of operations even more predictable and give higher stability to the repositioned segments. This study investigates a new resorbable osteosynthesis system in orthognathic patients. 50 patients were treated with P(L/DL)LA-TMC resorbable osteosynthesis and compared to a group of 50 patients treated with titanium miniplates. Segmental stability and relapse were measured comparing preoperative, postoperative and follow-up lateral cephalograms. Throughout this study, resorbables appeared to be as stable as titanium miniplates except in maxillary elongation and mandibular setback. Here, the titanium miniplates showed significantly higher stability than resorbable plates. P(L/DL)LA-TMC osteosynthesis seem to have less strength against compressive forces after maxillary elongation and they are less resistant to the forces the tongue exerts, pressing against the mandible after setback. It can therefore be concluded that the resorbable osteosynthesis can be used in the same situations as titanium miniplates except in maxillary elongation and mandibular setback.
在可吸收微型板使用了二十年之后，仍在开发新的聚合物可吸收骨内固定材料，以提高手术的可预测性和可操作性，并为重新定位的骨段提供更高的稳定性。本研究探讨了一种新的可吸收骨内固定系统在正颌患者中的应用。50 例患者采用聚（L/DL）乳酸-TMC 可吸收骨内固定系统治疗，并与 50 例采用钛微型板治疗的患者进行比较。通过比较术前、术后和随访侧位头颅侧位片来测量节段稳定性和复发情况。在整个研究过程中，可吸收材料的稳定性与钛微型板一样，除了在上颌延长和下颌后退方面。在这些方面，钛微型板显示出比可吸收板更高的稳定性。在经过上颌延长后，聚（L/DL）乳酸-TMC 骨内固定系统对压缩力的强度似乎较低，而且在后退后，它们对来自舌的压力的抵抗力较低，舌会压在下巴上。因此，可以得出结论，可吸收骨内固定系统可以在与钛微型板相同的情况下使用，但不包括上颌延长和下颌后退。
